java/demo/Freeze/library/BookI.java

   1 // **********************************************************************
   2 //
   3 // Copyright (c) 2003-2011 ZeroC, Inc. All rights reserved.
   4 //
   5 // This copy of Ice is licensed to you under the terms described in the
   6 // ICE_LICENSE file included in this distribution.
   7 //
   8 // **********************************************************************
   9
  10 import Demo.*;
  11
  12 class BookI extends Book
  13 {
  14     //
  15     // No read/write mutexes in Java - hence use native
  16     // synchronization.
  17     //
  18
  19     synchronized public BookDescription
  20     getBookDescription(Ice.Current current)
  21     {
  22         if(_destroyed)
  23         {
  24             throw new Ice.ObjectNotExistException();
  25         }
  26
  27         //
  28         // Immutable.
  29         //
  30         return description;
  31     }
  32
  33     synchronized public String
  34     getRenterName(Ice.Current current)
  35         throws BookNotRentedException
  36     {
  37         if(_destroyed)
  38         {
  39             throw new Ice.ObjectNotExistException();
  40         }
  41
  42         if(rentalCustomerName.length() == 0)
  43         {
  44             throw new BookNotRentedException();
  45         }
  46         return rentalCustomerName;
  47     }
  48
  49     synchronized public void
  50     rentBook(String name, Ice.Current current)
  51         throws BookRentedException
  52     {
  53         if(_destroyed)
  54         {
  55             throw new Ice.ObjectNotExistException();
  56         }
  57
  58         if(rentalCustomerName.length() != 0)
  59         {
  60             throw new BookRentedException();
  61         }
  62         rentalCustomerName = name;
  63     }
  64
  65     synchronized public void
  66     returnBook(Ice.Current current)
  67         throws BookNotRentedException
  68     {
  69         if(_destroyed)
  70         {
  71             throw new Ice.ObjectNotExistException();
  72         }
  73
  74         if(rentalCustomerName.length() == 0)
  75         {
  76             throw new BookNotRentedException();
  77         }
  78         rentalCustomerName = new String();;
  79     }
  80
  81     synchronized public void
  82     destroy(Ice.Current current)
  83         throws DatabaseException
  84     {
  85         if(_destroyed)
  86         {
  87             throw new Ice.ObjectNotExistException();
  88         }
  89
  90         _destroyed = true;
  91
  92         try
  93         {
  94             _library.remove(description);
  95         }
  96         catch(Freeze.DatabaseException ex)
  97         {
  98             DatabaseException e = new DatabaseException();
  99             e.message = ex.message;
 100             throw e;
 101         }
 102     }
 103
 104     BookI(LibraryI library)
 105     {
 106         _library = library;
 107         _destroyed = false;
 108
 109         //
 110         // This could be avoided by having two constructors (one for
 111         // new creation of a book, and the other for restoring a
 112         // previously saved book).
 113         //
 114         rentalCustomerName = new String();
 115     }
 116
 117     private LibraryI _library;
 118     private boolean _destroyed;
 119 }